CN102656780B - Low noise rotor or stator of an electric motor or generator and method of assembling the same - Google Patents

Low noise rotor or stator of an electric motor or generator and method of assembling the same Download PDF

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Publication number
CN102656780B
CN102656780B CN201080056441.3A CN201080056441A CN102656780B CN 102656780 B CN102656780 B CN 102656780B CN 201080056441 A CN201080056441 A CN 201080056441A CN 102656780 B CN102656780 B CN 102656780B
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CN
China
Prior art keywords
core
crack
tooth
stator
body portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201080056441.3A
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Chinese (zh)
Other versions
CN102656780A (en
Inventor
G·E·霍斯特
J·R·博雷尔
D·E·拜利
D·E·希尔顿
G·M·莱文
B·P·科莱因
L·R·多宏恩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Motor Corp
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Nidec Motor Corp
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Publication date
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Publication of CN102656780A publication Critical patent/CN102656780A/en
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Publication of CN102656780B publication Critical patent/CN102656780B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/30—Windings characterised by the insulating material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/527—Fastening salient pole windings or connections thereto applicable to rotors only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49012—Rotor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making

Abstract

A stator or rotor of an electric motor or generator comprises a core formed of ferromagnetic material having a plurality of teeth arranged circumferentially about an axis. In one aspect of the invention, at least one retaining member connects the end portions of at least two of the teeth to each other in a manner inhibiting relative movement between said tooth end portions. By inhibiting relative movement between said tooth end portions, vibration is reduced. Vibration can also be reduced by welding interior surfaces of a core to each other. Reducing the vibration reduces the noise emissions of the rotor or stator during operation.

Description

The low-noise rotor of motor or generator or stator and assemble method thereof
The cross reference of related application
The application advocates that the sequence number submitted on December 4th, 2009 is the priority of the U.S. Provisional Patent Application of 61/286,305, and the full content of this provisional application is incorporated herein by reference.
Federal government's sponsored research or exploitation statement
Inapplicable.
Annex
Inapplicable.
Technical field
Relate generally to motor of the present invention and generator, say with having more, and the present invention relates to the noise reducing stator or rotor generation, and by rotor or stator tooth, the relative motion between the described rotor in non-constant magnetic field or stator tooth causes on described noise section ground.The present invention increases rigidity between tooth to suppress the mode of relative motion.
Background technology
Motor and generator are primarily of rotor and stator composition.Stator can surrounding rotor, and rotor also can around stator.Alternatively, rotor and stator can axially be arranged side by side.In operation, these assemblies at least one by via winding transmit fluctuating current produce fluctuating magnetic field.This class component generally includes and is roughly circular ferromagnetic core, and described ferromagnetic core has the tooth that multiple radial direction extends.Each tooth by Induced magnetic field on whole tooth winding around.The magnetic force acting on each tooth fluctuates during operation, result, and often pair of adjacent teeth can be stressed, and described power forces this to move in opposite directions tooth sometimes, sometimes forces this to the opposing movement of tooth.This causes the vibration in rotor or stator, and described vibration transfers to produce undesirable audible noise.
Summary of the invention
The present invention is intended to the relative motion and the vibration that reduce or suppress stators and rotators tooth.This is by being mechanically interconnected by the free end of tooth and/or being realized by the rigidity of the main part increasing core by one or more pad.
In one aspect of the invention, the stator of motor or generator or rotor comprise core, multiple winding and at least one stop (retaining) part.Described core is made up of ferromagnetic material and is had circular body (body) and multiple tooth.Described circular body defines central shaft.Described axle defines radial direction and circumference.Described tooth is around described axle circumferential array.Each tooth radially extends to respective teeth end section from described circular body.Each winding extends around a corresponding tooth, makes described winding radial between the tooth end section and described circular body of described respective teeth.The tooth end section of at least two teeth is interconnected to suppress the relative motion between described tooth end section by described retainer.
In another aspect of this invention, the stator of a kind of assembling motor or generator or the method for rotor comprise the step be attached to by least one retainer on stator or rotor core.Described core is made up of ferromagnetic material and is had circular body and multiple tooth.Described circular body defines central shaft.Described axle defines radial direction and circumference.Described tooth is around described axle circumferential array, and each tooth radially extends to respective teeth end section from described circular body.Described stator or rotor also comprise multiple winding.Each winding extends around a corresponding tooth, makes described winding radial between the tooth end section and described circular body of described respective teeth.The tooth end section of at least two teeth is interconnected to suppress the relative motion between described tooth end section by described retainer.
In still another aspect of the invention, a kind of method of the stator or rotor that form motor or generator comprises formation stator or rotor core.Described core is made up of ferromagnetic material and is had annular body portion and multiple tooth.Described annular body portion defines central shaft.Described axle defines radial direction and circumference.Described tooth around described axle circumferential array, and radially stretches out from described annular body portion.Described annular body portion comprises multiple inner surface towards described axle.Crack extends between an inner surface, and extends radially outward partially by described annular body portion.Described crack has a pair opposite face.Described method also comprises increases the step of the rigidity of described core with the relative motion limited between a described inner surface by being welded to each other at least partly of the opposite face in described crack together.
Below with reference to the accompanying drawings further feature and advantage of the present invention and operation of the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is the decomposition diagram of stator or rotor core and the insulating cover encasing described core.
Fig. 2 is the perspective view of one embodiment of the invention, wherein for description object of the present invention, eliminates some windings and has excised the part of one of insulating cover.
Fig. 3 is the detail view of the embodiment of the present invention in the circle 3-3 shown in Fig. 2.
Fig. 4 is the tooth end section of multiple teeth that the embodiment of the present invention is shown and the details plan view from above of some retainers.
Fig. 5 is the perspective view of the retainer of the embodiment of the present invention.
Fig. 6 is another perspective view of the retainer shown in Fig. 5.
Fig. 7 is the end view of the retainer shown in Fig. 5 and 6.
Fig. 8 is the vertical view of the retainer shown in Fig. 5-7.
Fig. 9 illustrates the present invention's stator on the other hand or the perspective view of rotor core.
Figure 10 is the detail view of the core shown in Fig. 9.
Item corresponding to the label instruction of writing in specification and accompanying drawing.
Embodiment
Fig. 1 illustrates according to the exemplary embodiment of stator of the present invention or rotor core and the insulating cover encasing described core.Core 10 is made up of ferromagnetic material and is preferably taked the form of stack of laminations (stack oflaminations) or spiral lamination stack (spirally overlaid laminations).The main body 12(that core 10 has substantial circular is annular body in this example) and multiple tooth 14 radially extending (in this example for extending radially outward) from described circular body.Each tooth 14 has the end section 16 relative with circular body 12 and extends to the mid portion 18 of described end section from described circular body.The end section 16 of tooth vertically to point (bisect), makes tooth have T-shaped configuration by the mid portion 18 of each tooth 14.Insulating cover 20 encase core 10 together and electric screen is carried out to described core so that and winding 22 isolate.Each winding 22(is represented by substantially annular (toroidal) element in the drawings) be wound around the mid portion 18 of respective teeth 14.
Should be appreciated that, above and the substantial circular used in the claims only mean the circular body of described core around central shaft.Circular body 12 does not need to be round completely, and can be such as polygon.
The method for optimizing of the relative motion between the tooth 14 of minimizing core 10 uses multiple plastics retainer 24.Each retainer 24 is preferably wedged and is snapped in (snap) and puts in place between the end section 16 of corresponding a pair adjacent teeth 14.Hereafter will introduce in more detail this.
Fig. 5-8 illustrates separately one of retainer 24.Retainer 24 comprises multiple extruding projection 26 with loading end 28.One wedge surface 30 is preferably crossing with each loading end 28 and be orientated angled relative to respective carrier face.Retainer 24 also preferably includes the flexible trimmer of multiple cardinal principle (tab) 32.Each trimmer 32 comprises locking projection 34.Further, retainer 24 comprises multiple stop projection 36 being configured to guarantee retainer 24 location correct in core 10.
Each retainer 24 is configured to wedge between corresponding a pair adjacent teeth 14 of core 10, as in Figure 2-4.This is close to corresponding a pair adjacent teeth 14 by radially positive stop 24 and realizes.Wedge surface 30 is configured to engage with the opposite flank of the end section 16 of tooth 14, thus described retainer is pushed put in place time, to such opposite flank apply increase extruding force.
Finally, the loading end 28 of described retainer engages with the opposite flank of the end section 16 of tooth 14 and keeps the extruding force to described opposite flank.When retainer 24 is attached on core 10 as mentioned above, described trimmer also engages with the opposite flank of the end section 16 of tooth 14.Therefore, when retainer 24 is attached on core 10, trimmer 32 flexibly deflects towards this gap center between tooth 14.Finally, the stop projection 36 of retainer 24 engages with the outer surface of tooth 14, thus stops and anyly further described retainer is inserted the gap between described tooth.When that point is reached, the locking projection 34 of the trimmer 32 of retainer 24 exceeds end section 16 both sides of tooth 14, causes described trimmer to be elastically returned to it at least in part like this and does not deflect configuration.Make locking projection 34 engage with the surface of the mid portion 18 towards described tooth of the end section 16 of tooth 14 like this, thus relative to core 10, described retainer locking is put in place.
When being attached to as mentioned above on core 10, each retainer 24 suppresses the move toward one another of corresponding a pair tooth 14.After placed retainer 24 between often pair of adjacent teeth 14, described tooth and described retainer all lock together, thus form structure ring.Considerably reduce the relative motion between any tooth 14 like this, thus the noisiness that great minimizing rotor or stator produce during operation.
Although the stator shown in Fig. 3 or rotor eliminate some windings 22 and partly excised upper portion insulating cover, should be appreciated that, retainer 24 can and be preferably attached on stator or rotor after all windings are in place.Like this, be also to be understood that the noise can applied the present invention and produce to reduce it on existing stator or rotor.
Still further, although the preferred embodiments of the present invention use above-mentioned extrusion pressing type retainer, should be appreciated that, inventor contemplates other modes to suppress tooth motion relative to each other.Such as, one or more tensioning (tension) type retainer is provided can to produce substantially identical effect.More particularly, by substantially not extensile adhesive plaster or to be tied by the tooth end section of stator or rotor by hard fibre and can to suppress often pair of opposing movement of adjacent teeth, thus inhibit the motion relative to each other of described tooth.Be also to be understood that and need not suppress all teeth, because suppress some tooth still can reduce produced noise, although be reduce noise in less degree.
Fig. 9 and 10 illustrates another embodiment of the method increasing rotor or stator core rigidity.Core shown in Fig. 9 50 is similar and comprise annular body portion 52 and multiple tooth 54 with above-mentioned core.Tooth 54 radially stretches out from annular body portion 52.As shown in Figures 9 and 10, the generation type of described core creates multiple radially partially to the crack 56 of extension part by the annular body portion 52 of core 50.Occur that this situation is because core 50 is preferably by lamination (the being originally straight) formation partly forming described core around bending shaft.Should be appreciated that, form lamination in mode straight at first and cause producing less waste material in lamination forming process.Be also to be understood that before bending lamination, the crack 56 formed is opened, but closed when bending lamination subsequently.As being clear that in Fig. 10, for the ease of bending, crack 56 radially extends, almost completely by annular body portion 52.This makes annular body portion 52 at first almost not perpendicular to the rigidity of axle.
Due to crack 56, core 50 comprises the inner surface 58 of multiple formation ring.Each crack 56 extends between corresponding a pair adjacent inner surface 58.According to an aspect of the present invention, together with adjacent with crack 56 inner surface 58 is welded to each other.Preferably, annular (annular) bead weld 60 each inner surface 58 being adjacent inner surface and welding together is formed.Described bead weld is preferably relative to axially centralized positioning on core 50.By being welded to each other together by an adjacent inner surface 58, because described inner surface cannot move relative to each other again, therefore on the position, crack 56 of being separated by this type of inner surface, the rigidity of core 50 significantly increases.Even if described in be welded on axially relatively thin, it also can eliminate the impact that crack 56 can produce originally on the rigidity of core 50 effectively.Which reduce vibration, thus decrease the noise of stator or rotor generation.
Should be appreciated that, welding aspect of the present invention can use independently, also can be combined with above-mentioned retainer aspect.And in order to increase the rigidity of rotor or stator further, the winding that inventor has found sealing water-base epoxy varnish to put on rotor or stator can reduce the vibration of the tooth of core and thus reduce the noise that rotor or stator produce further.
According to the above, should be appreciated that, the present invention can realize the multiple advantages relative to existing rotor and stator design.
Due to when not departing from the scope of the invention, various amendment can be made to described herein and shown structure and method, comprise in describing above or all the elements shown in accompanying drawing be intended to be interpreted as exemplary, but not to limit.Therefore, range of the present invention and scope should not limited by above-mentioned exemplary embodiment, but only by claims and equivalent thereof limit below.
Should also be appreciated that, when claim or above to the description of exemplary embodiment of the present in introduce element of the present invention time, term " comprises ", " comprising " and " having " be intended to middle opening, and mean to there are other elements except institute's column element.In addition, term " part " should be understood to the part or all of of its item of limiting of intention or element.And the identifier of use such as first, second, and third and so on should not be regarded as forcing any relative position or time sequencing between restriction feature.Still further, the appearance order of the step of any claim to a method should not be regarded as limiting this type of step and must perform in this order below.Should be appreciated that, substantial circular only represents that the circular body of core is around central shaft.Circular body does not need to be round completely, and can be such as polygon.

Claims (6)

1. form a method for the stator of motor or generator, described method comprises:
Form stator core, described core is made up of ferromagnetic material and is had annular body portion and multiple tooth, described annular body portion definition central shaft, described axle definition is radial and circumferential, described tooth is around described axle circumferential array and radially stretch out from described annular body portion, described annular body portion comprises multiple inner surface towards described axle, one crack extends and extends radially outward partially by described annular body portion between an inner surface, and described crack has a pair opposite face;
Being welded to each other at least partially of the opposite face in described crack is increased the rigidity of described core with the relative motion limited between a described inner surface together,
Described welding step comprises establishment around described axle cardinal principle circumference extension and by the welding interconnected at least partially of the opposite face in described crack.
2. method as described in claim 1, wherein said crack extends axially through described annular body portion.
3. method as described in claim 1, wherein said core comprises multiple crack and each crack extends and extends radially outward partially by described annular body portion between an inner surface, described each crack has a pair opposite face, and described welding is by the annular solder interconnected at least partially of the opposite face in described each crack.
4. as described in claim 1 method, wherein said core has axial opposing end surface and the generation type of described welding makes described welding with uniform intervals between described opposing end surface.
5. as described in claim 1 method, wherein said stator also comprises multiple winding, and each winding extends around respective teeth, and wherein said method comprises further and uses water-base epoxy varnish to be the japanning of described winding.
6. method as described in claim 1, wherein said welding is bead weld.
CN201080056441.3A 2009-12-14 2010-12-09 Low noise rotor or stator of an electric motor or generator and method of assembling the same Active CN102656780B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US28630509P 2009-12-14 2009-12-14
US61/286,305 2009-12-14
US12/890,298 2010-09-24
US12/890,298 US8567043B2 (en) 2009-12-14 2010-09-24 Method of assembling low noise rotor or stator of an electric motor or generator
PCT/US2010/059705 WO2011081828A2 (en) 2009-12-14 2010-12-09 Low noise rotor or stator of an electric motor or generator and method of assembling the same

Publications (2)

Publication Number Publication Date
CN102656780A CN102656780A (en) 2012-09-05
CN102656780B true CN102656780B (en) 2015-03-25

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US (2) US8567043B2 (en)
KR (2) KR101483348B1 (en)
CN (1) CN102656780B (en)
WO (1) WO2011081828A2 (en)

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US20140010642A1 (en) 2014-01-09
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